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Microchip Technology MCP41050-I/P
- Part No.:
- MCP41050-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MCP41050-I/P.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:186
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Product details
Overview
MCP41050-I/P from Microchip Technology is a single-channel, 256-tap digital potentiometer with 50 kΩ nominal resistance, SPI™ serial interface (mode 0,0 and 1,1), ±1 LSB max INL/DNL, and operates from 2.7V to 5.5V supply. It serves as a programmable rheostat or voltage divider in precision analog trimming circuits for sensor calibration and power supply feedback loops.
For engineers reviewing the MCP41050-I/P datasheet, MCP41050-I/P pinout, MCP41050-I/P application, or MCP41050-I/P equivalent, this page delivers verified electrical specs, package mapping, real-world use scenarios, and validated alternative parts for industrial-grade analog control designs requiring stable resistance tuning without mechanical wear.
Technical Context
The MCP41050-I/P implements an 8-bit wiper register controlling a linear 50 kΩ resistor array with terminal A, B, and wiper (W) connections. Its SPI interface uses CS, SCK, and SI pins only-no SO, RS, or SHDN-confirming its single-channel, non-daisy-chain, software-shutdown-only architecture per the MCP41XXX family.
It supports both rheostat (A–W or B–W) and potentiometer (A–B with W tap) configurations. Wiper resistance is 125 Ω (typ) at VDD = 5.5V, and full-scale error is –1 LSB (max) at VDD = 5V, enabling accurate gain/offset adjustment in closed-loop systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Resistance | 50 kΩ - defines maximum end-to-end resistance range for analog signal scaling and bias setting |
| Resolution | 256 taps (8-bit) - enables 0.39% incremental resistance steps for fine-grained calibration |
| INL / DNL | ±1 LSB max - guarantees monotonicity and predictable linearity across all codes for precision feedback |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic systems without level shifting |
| Static Current | 1 µA max - allows battery-powered or low-power standby operation without significant drain |
| Temp Range | –40°C to +85°C - rated for industrial ambient conditions without derating |
| Interface | SPI mode 0,0 and 1,1 - ensures interoperability with standard microcontroller SPI peripherals |
Pinout & Package
Package: 8-pin PDIP (plastic dual in-line package), through-hole mounting, 0.3-inch body width, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select input | Active-low SPI enable; gates clock/data activity and reduces current draw when high |
| 2 SCK | Serial Clock input | Rising-edge clock for SI data capture; Schmitt-triggered for noise immunity |
| 3 SI | Serial Data Input | Loads 16-bit command/data; gated by CS to prevent spurious writes |
| 4 VSS | Ground reference | System common return for analog and digital sections; must be low-impedance |
| 5 PA0 | Potentiometer Terminal A | High-side resistive endpoint; connects to VDD or signal source in divider/rheostat mode |
| 6 PW0 | Wiper output | Programmable tap point; resistance to PA0/PB0 varies linearly with 8-bit code |
| 7 PB0 | Potentiometer Terminal B | Low-side resistive endpoint; tied to ground or reference in most feedback applications |
| 8 VDD | Positive supply | Single 2.7–5.5V rail powers logic and resistor array; requires local 0.1 µF bypass |
Key Features
| Feature | Design Value |
|---|---|
| Software shutdown mode | Opens PA0 and shorts PW0 to PB0 - eliminates current path through resistor array for zero static power in idle state |
| Mid-scale power-up default | Wiper auto-initializes to code 80h (128/256) - ensures known startup resistance and avoids transient overloads |
| Low wiper resistance | 125 Ω typical at 5.5V - minimizes insertion loss and voltage drop in signal-path applications |
| Industrial temperature rating | –40°C to +85°C operation - supports deployment in motor drives, PLC I/O modules, and outdoor instrumentation |
| Resistor tempco | 800 ppm/°C - predictable drift enables compensation algorithms in temperature-sensitive gain stages |
Applications
| Temperature Sensor Calibration | Laser Diode Bias Control |
|---|---|
Use Scenario: Adjusting offset/gain in RTD or thermistor signal conditioning circuitry to meet NIST-traceable accuracy requirements across –20°C to +70°C. IC Role / Device Role / Timing Role: Programmable voltage divider setting reference voltage for instrumentation amplifier input stage. Use Value: Enables field recalibration without hardware change; 50 kΩ value matches typical bridge sensor impedance for optimal SNR. | Use Scenario: Setting precise bias current for telecom-grade laser diodes in optical transceivers where threshold current drift must stay <±0.5% over life. IC Role / Device Role / Timing Role: Rheostat-mode current-limiting element in constant-current source feedback loop. Use Value: Replaces mechanical trimpot with 256-step repeatability; 1 µA static current extends module sleep-mode battery life. |
| DC-DC Converter Feedback | Audio Channel Balance |
Use Scenario: Dynamically adjusting output voltage of isolated flyback or buck converter during system boot or adaptive load management. IC Role / Device Role / Timing Role: Potentiometer-mode divider setting FB pin reference for error amplifier. Use Value: Supports remote voltage programming via MCU SPI; 800 ppm/°C tempco aligns with TL431 reference drift for stable regulation. | Use Scenario: Implementing digital volume control in professional audio mixers where channel-to-channel matching <1% is required for stereo imaging. IC Role / Device Role / Timing Role: Dual-ratio attenuator in analog signal path before ADC or power amp stage. Use Value: Eliminates mechanical wear and contact noise; 50 kΩ value matches standard line-level impedance for minimal loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5175BRMZ-50 | 50 kΩ, I²C interface, 256-tap, 10 ppm/°C tempco, 35 Ω wiper resistance | Requires I²C host; lower tempco suits metrology; higher cost and smaller package | Select for ultra-low drift or space-constrained PCBs where I²C is preferred over SPI |
| MCP42050-I/P | Dual-channel 50 kΩ device in 14-pin PDIP/SOIC/TSSOP; adds SO, RS, SHDN pins and daisy-chain capability | Supports two independent pots per package; hardware shutdown and reset pins included | Choose when board layout accommodates larger footprint and dual-pot functionality is needed for matched gain/offset tuning |
Compared with AD5175BRMZ-50 and MCP42050-I/P, the MCP41050-I/P offers SPI-native integration with minimal pin count and proven industrial reliability-ideal for cost-sensitive, single-pot applications where mechanical replacement and field recalibration are primary goals.
Availability
MCP41050-I/P is available at Aetrix Electronics and suitable for sensor calibration, power supply feedback, and audio signal conditioning requiring stable component supply, long-term obsolescence planning, and traceable lot-level documentation.
Supply support for MCP41050-I/P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and timing solutions for industrial, automotive, and consumer markets.
The MCP41XXX series was designed specifically for replacing mechanical potentiometers in programmable analog circuits-emphasizing SPI simplicity, low power, and robustness across extended temperature ranges.
FAQ
What is the wiper resistance specification for MCP41050-I/P at 3.3V supply?
The MCP41050-I/P exhibits a typical wiper resistance of 175 Ω at VDD = 2.7V and IW = 1 mA (code 00h), per DS11195C-page 3. At 3.3V, this value falls within the 125–250 Ω range specified for the 50 kΩ version, ensuring predictable insertion loss in low-voltage signal paths without requiring external buffering.
Does MCP41050-I/P support hardware shutdown or reset functionality?
No. The MCP41050-I/P is a single-channel MCP41XXX device and lacks RS and SHDN pins-those are exclusive to dual-channel MCP42XXX variants. Shutdown is implemented solely via software command; there is no dedicated hardware shutdown or reset pin on the MCP41050-I/P.
Can MCP41050-I/P be used in rheostat mode with only two terminals connected?
Yes. The MCP41050-I/P supports true rheostat operation: connect PA0 and PW0 as the two-terminal variable resistor, leaving PB0 unconnected or tied to PW0. This configuration achieves 0–50 kΩ adjustable resistance with 256 discrete steps and ±1 LSB linearity, ideal for current-setting applications.
What is the maximum SPI clock frequency supported by MCP41050-I/P?
The MCP41050-I/P supports up to 10 MHz SPI clock frequency at VDD = 5V, as specified in DS11195C-page 5. Timing parameters including tSU (40 ns setup) and tHD (10 ns hold) ensure reliable communication with modern microcontrollers-even at full speed-without requiring wait states or clock stretching.
Is MCP41050-I/P pin-compatible with other MCP41XXX variants like MCP41010-I/P or MCP41100-I/P?
Yes. All MCP41XXX devices-including MCP41010-I/P (10 kΩ), MCP41050-I/P (50 kΩ), and MCP41100-I/P (100 kΩ)-share identical 8-pin PDIP/SOIC pinouts and SPI command structure. Only the nominal resistance differs; no PCB redesign is needed when swapping between these variants for different impedance requirements.
MCP41050-I/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 800ppm/°C
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-PDIP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 175
MCP41050-I/P FAQ
1.How can I place an order for MCP41050-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP41050-I/P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP41050-I/P reliable?
The price and inventory of MCP41050-I/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP41050-I/P is usually 5 days.
3.What payment methods are accepted for MCP41050-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP41050-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP41050-I/P?
MCP41050-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP41050-I/P order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP41050-I/P?
For technical support, including MCP41050-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP41050-I/P requirements.
6.How does Aetrix verify that MCP41050-I/P is sourced from the original manufacturer or authorized distributors?
All MCP41050-I/P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP41050-I/P meets industry standards.
7.What is the process for return or replacement of MCP41050-I/P?
All MCP41050-I/P units undergo pre-shipment inspection (PSI). If there is an issue with MCP41050-I/P, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP41050-I/P part is unused and in its original packaging.
Return procedure for MCP41050-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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